Abstract
In 1984, 643 pediatric malignant solid tumors were registered to the Japanese Society of Pediatric Surgeons under the support of the Children's Cancer Association of Japan. Among those, there were 151 neuroblastoma group tumors, 59 malignant renal tumois, 33 liver tumors, 101 teratoma, 37 rhabdomyosarcomas and 262 other tumors. In 151 neuroblastoma group tumors, there were 99 neuroblastomas, 39 ganglioneuroblastomas and 13 ganglioneuromas. Twelve cases were discovered under the nation-wide VMA mass screening system. Primary tumors were resected totally in 76 cases and subtotally in 22 cases. Second look operation was carried out in 10 cases. Among renal tumors, there were 58 Wilms' tumors, 3 adenocarcinomas and 4 mesoblastic nephromas. Chemotherapy was given to all the Wilm's tumors except one. Among the liver tumors, there were 26 hepatoblastomas, one hepatocarcinoma and 2 undifferentiated sarcomas. In macroscopic findings, 19 were massive, 7 were multi-nodular and one were diffuse in type. In the stage distribution, 77% were Stage III or IV among hepatoblastoma. In teratoma group, 65 mature, 11 immature and 23 malignant tumors were included. Two were head and neck tumors, 9 mediastinal, 33 ovarian, 15 testicular and 23 sacrococcygeal tumors. Total resection was carried out in 88%. VAC was the main chemotherapeutic method. In rhabdomyosarcoma, 14 were in pelvis, 3 in thorax, 4 in extremities and 10 in abdomen. In other tumors, 69 malignant lymphomas, 86 brain tumors, 20 retinoblastomas and 69 osteosarcomas were included.
